Original Research
Keywords: Innovation, Health, Orthodontics, Nanoparticles, Zinc oxide, Sodium hyaluronate, Wire coating.
Year : 2026 | Volume : 17 | Issue : 3 | Page : 107-115
Evaluation of Mechanical Properties and Coating Adherence of Zinc Oxide-Sodium Hyaluronate Coated Stainless Steel Orthodontic Arch-wires: A Comparative In Vitro Study
Najiya VP-1, Shweta Nagesh-2, Pugalmani Sivashanmugam-2, K.K.Shantha Sundari-3, Revathy Gounder-4
1-Postgraduate Resident, 2-Assistant Professor, 3-Professor, Department of Orthodontics and Dentofacial Orthopaedics, 4-Associate Professor, Department of Prosthodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, TamilNadu.
ABSTRACT
BACKGROUND: Advancements in nanotechnology and materials research have given rise to coatings that can be used on orthodontic materials like arch wires for the purpose of enhancing their properties. It is also essential to evaluate how such coatings alter the overall performance and properties of the coated substrate. Hence, this in vitro study aimed to evaluate mechanical properties like tensile strength, flexural strength, and coating adherence after brushing simulation of zinc oxide-sodium hyaluronate (ZnO-SH) coated on stainless steel (SS) orthodontic arch wires.
MATERIALS AND METHODOLOGY: Commercially available SS arch wires were divided into two groups, uncoated controls and ZnO-SH coated specimens. Tensile and flexural strength were measured with a universal testing machine. Coating adherence after simulated tooth brushing using a brushing simulator was assessed by scanning electron microscopy (SEM). Welch’s t-tests were used to evaluate differences, with statistical significance set at p≤0.05.
RESULTS: The tensile (p = 0.495) and flexural strength (p = 0.223) did not demonstrate significant differences between the coated and uncoated groups. Pre-brushing SEM revealed a dense, continuous coating adherent to the wire surface, while the post-brushing SEM showed the coating remained intact with superficial abrasions with no delamination or substrate exposure.
CONCLUSIONS: ZnO-SH nanoparticle coating did not significantly alter the flexural or tensile stress of SS orthodontic arch wires compared with uncoated controls. The coated wires demonstrated comparable tensile strength and good post-simulated brushing adherence.
KEYWORDS: Innovation, Health, Orthodontics, Nanoparticles, Zinc oxide, Sodium hyaluronate, Wire coating.
SOURCE OF FUNDING
Nil
CONFLICT OF INTEREST
Nil
How to cite this article: Najiya VP, Shweta Nagesh, Pugalmani Sivashanmugam, K.K.Shantha Sundari, Revathy Gounder. Evaluation of Mechanical Properties and Coating Adherence of Zinc Oxide-Sodium Hyaluronate Coated Stainless Steel Orthodontic Arch-wires: A Comparative In Vitro Study.
Int J Orthod Rehabil 2026; 17 (3): 107-115.
Doi: https://doi.org/10.56501/internationaljournaloforthodonticrehabilitation/vol-17/issue-3/ms-2026-028